The previous unit introduced the term exponent to represent the repeated multiplication of a number by itself. For example, the exponent tells us how many times we need to multiply the number 10 by itself to obtain 1000, i.e. three times as 10 × 10 × 10 = 1000. Here the base is 10 and the exponent is 3. We now consider the closely related topic of what power a number must be raised to in order to obtain another number. The number being raised to the power is called the base and value of the power is called the logarithm.
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